code: def dataset(self):
      return self.ctx
  
file_path: DeepKE/example/llm/CPM-Bee/src/cpm_live/training_tasks/ant/pretrain.py
imports: import torch.utils.data
  import random
  import numpy
label_desc: Use image node_id 3 for calling the CPMAntPretrainDataset obj's underlying member method code with example usage: obj.dataset() and returns: self